@font-face { font-family: "Barlow Semi Condensed"; src: url(/fonts/barlow-semi-condensed-600.woff2) format("woff2"); font-weight: 600; font-display: swap; }
@font-face { font-family: "Barlow Semi Condensed"; src: url(/fonts/barlow-semi-condensed-700.woff2) format("woff2"); font-weight: 700; font-display: swap; }
@font-face { font-family: Barlow; src: url(/fonts/barlow-400.woff2) format("woff2"); font-weight: 400; font-display: swap; }
@font-face { font-family: Barlow; src: url(/fonts/barlow-500.woff2) format("woff2"); font-weight: 500; font-display: swap; }
@font-face { font-family: Barlow; src: url(/fonts/barlow-700.woff2) format("woff2"); font-weight: 700; font-display: swap; }
@font-face { font-family: "IBM Plex Mono"; src: url(/fonts/ibm-plex-mono-400.woff2) format("woff2"); font-weight: 400; font-display: swap; }
@font-face { font-family: "IBM Plex Mono"; src: url(/fonts/ibm-plex-mono-600.woff2) format("woff2"); font-weight: 600; font-display: swap; }

:root {
  --bg: #090c0f; --s1: #101418; --s2: #151a1f; --s3: #20272d; --line: #293138; --line-2: #3a434b;
  --text: #f2f4f5; --text-2: #bbc2c8; --muted: #8e99a2; --yellow: #f4cf22; --info: #86bde8;
  --display: "Bahnschrift SemiCondensed", "Barlow Semi Condensed", "Segoe UI", system-ui, sans-serif;
  --body: Barlow, "Segoe UI", system-ui, sans-serif; --mono: "IBM Plex Mono", ui-monospace, Consolas, monospace;
  color-scheme: dark;
}
* { box-sizing: border-box; }
/* Fluid base size: 16px to about 1280px wide, 20px at 2560, capped at 22px. All rem sizes scale with it. */
html { background: var(--bg); font-size: clamp(100%, calc(0.3125vw + 12px), 137.5%); }
body { margin: 0; background: var(--bg); color: var(--text); font: 400 1.0625rem/1.55 var(--body); -webkit-font-smoothing: antialiased; }
a { color: inherit; }
h1, h2, h3 { font-family: var(--display); font-weight: 700; margin: 0; }
.visually-hidden { position: absolute; width: 1px; height: 1px; margin: -1px; padding: 0; border: 0; overflow: hidden; clip: rect(0 0 0 0); white-space: nowrap; }
.skip { position: absolute; left: 0.75rem; top: -60px; z-index: 20; background: var(--yellow); color: var(--bg); padding: 0.625rem 0.875rem; border-radius: 0.25rem; font-weight: 700; }
.skip:focus { top: 0.75rem; }
:focus-visible { outline: 2px solid var(--yellow); outline-offset: 3px; }

/* Navigation over the hero */
.nav { position: absolute; z-index: 10; left: 0; right: 0; top: 0; height: 4.5rem; display: flex; align-items: center; padding: 0 clamp(1rem, 3vw, 2.5rem);
  border-bottom: 1px solid rgba(41, 49, 56, .7); background: rgba(9, 12, 15, .55); backdrop-filter: blur(0.375rem); }
.brand { display: flex; align-items: center; gap: 0.75rem; text-decoration: none; font: 600 1.25rem/1 var(--display); letter-spacing: .06em; }
.brand small { display: block; margin-top: 0.25rem; font: 600 0.6875rem/1 var(--body); letter-spacing: .14em; color: var(--muted); }
.nav nav { margin-left: auto; display: flex; gap: clamp(0.875rem, 2vw, 1.625rem); align-items: center; font-size: 0.9375rem; }
.nav nav a { color: var(--text-2); text-decoration: none; }
.nav nav a:hover { color: var(--text); }
.nav .signin { border: 1px solid var(--yellow); color: var(--yellow) !important; padding: 0.5625rem 1rem; border-radius: 0.25rem; font-weight: 600; }

/* Hero */
/* --edge is the sections' content edge (centred .wrap, max(84rem, 70%)), so the hero text shares the page's left margin. */
.hero { --edge: max(clamp(1.25rem, 5vw, 4rem), calc((100% - max(84rem, 70%)) / 2 + clamp(1.25rem, 5vw, 4rem)));
  position: relative; display: flex; align-items: center; min-height: max(40rem, 100vh); overflow: hidden; background: var(--bg); }
.hero canvas { position: absolute; inset: 0; width: 100%; height: 100%; display: block; cursor: crosshair; }
.hero.no-canvas { background: radial-gradient(ellipse at 66% 50%, #171c21 0%, #11151a 60%, #0b0e11 100%); }
.scrim { position: absolute; inset: 0; pointer-events: none;
  background: linear-gradient(90deg, rgba(9,12,15,.94) 0%, rgba(9,12,15,.82) 30%, rgba(9,12,15,.25) 52%, rgba(9,12,15,0) 66%),
              linear-gradient(180deg, rgba(9,12,15,.85) 0%, rgba(9,12,15,0) 14%, rgba(9,12,15,0) 80%, var(--bg) 100%); }
.copy { position: relative; z-index: 2; flex: 0 1 clamp(38rem, 36vw, 60rem); min-width: 0; margin-left: var(--edge); padding: 6.5rem clamp(1.25rem, 3vw, 3rem) 5rem 0; pointer-events: none; }
.copy a { pointer-events: auto; }
.eyebrow { margin: 0; display: flex; align-items: center; gap: 0.875rem; font: 600 0.75rem/1 var(--mono); letter-spacing: .2em; text-transform: uppercase; color: var(--yellow); }
.eyebrow::before { content: ""; width: 2.125rem; height: 2px; background: var(--yellow); }
/* Scales with height too, so the whole hero (and its simulated-data legend) fits one screen. */
.hero h1 { margin-top: 1.375rem; font-size: clamp(2.75rem, min(6.4vw, 10vh), 10rem); line-height: .92; letter-spacing: -.01em; }
.hero h1 span { color: var(--yellow); }
.lead { margin: 1.5rem 0 0; max-width: 34em; font-size: 1.1875rem; color: var(--text-2); }
.actions { margin-top: 2rem; display: flex; flex-wrap: wrap; gap: 0.75rem; }
.btn { display: inline-block; padding: 0.9375rem 1.375rem; border-radius: 0.25rem; font-weight: 700; font-size: 1rem; text-decoration: none; border: 1px solid var(--yellow); }
.btn.primary { background: var(--yellow); color: var(--bg); }
.btn.primary:hover { background: #ffe066; }
.btn.secondary { color: var(--text); border-color: var(--line-2); background: rgba(16, 20, 24, .7); }
.btn.secondary:hover { border-color: var(--text-2); }
.note { margin: 1rem 0 0; font-size: 0.875rem; color: var(--muted); }
.note a { color: var(--text-2); }
.stats { position: absolute; z-index: 2; right: 1.5rem; bottom: 3rem; margin: 0; display: flex; gap: 0.375rem; pointer-events: none; }
.stats div { background: rgba(16, 20, 24, .86); border: 1px solid var(--line); border-radius: 0.25rem; padding: 0.5rem 0.75rem 0.5625rem; min-width: 5.5rem; }
.stats dt { font: 600 0.625rem/1 var(--body); letter-spacing: .08em; color: var(--muted); text-transform: uppercase; }
.stats dd { margin: 0.375rem 0 0; font: 600 1.375rem/1 var(--display); }
.stats .y dd { color: var(--yellow); }
.card { position: absolute; z-index: 3; right: 1.5rem; top: 6rem; width: 18.75rem; background: rgba(16, 20, 24, .95); border: 1px solid var(--line); border-left: 2px solid var(--yellow);
  border-radius: 0.25rem; padding: 0.875rem 1rem 1rem; color: var(--text-2); opacity: 0; transform: translateX(0.5rem); transition: opacity .2s, transform .2s; pointer-events: none; }
.card.on { opacity: 1; transform: none; }
.card.other { border-left-color: var(--info); }
.card-head { display: flex; justify-content: space-between; align-items: baseline; gap: 0.75rem; }
.card .cs { font: 600 1.625rem/1 var(--display); color: var(--yellow); }
.card.other .cs { color: var(--text); }
.card .route { font: 600 1rem/1 var(--display); color: var(--text); }
.card .type { margin-top: 0.375rem; font-size: 0.75rem; color: var(--muted); }
.card dl { margin: 0.875rem 0 0; display: grid; grid-template-columns: 1fr 1fr; gap: 0.625rem 0.875rem; }
.card dt { font: 600 0.625rem/1 var(--body); letter-spacing: .08em; color: var(--muted); text-transform: uppercase; }
.card dd { margin: 0.25rem 0 0; font: 600 1rem/1 var(--display); color: var(--text); }
.card dd.y { color: var(--yellow); }
.prog { position: relative; margin-top: 1rem; height: 3px; background: var(--line-2); }
.prog b { position: absolute; left: 0; top: 0; bottom: 0; width: 0; background: var(--yellow); }
.prog i { position: absolute; top: -6px; left: 0; border-left: 0.625rem solid var(--yellow); border-top: 0.4375rem solid transparent; border-bottom: 0.4375rem solid transparent; margin-left: -5px; }
.legend { position: absolute; z-index: 2; left: var(--edge); bottom: 1rem; margin: 0; font: 600 0.625rem/1 var(--body); letter-spacing: .08em; color: var(--muted); text-transform: uppercase; }
.readout { position: absolute; z-index: 2; right: 1.5rem; bottom: 1.125rem; margin: 0; font: 0.6875rem/1 var(--mono); color: var(--muted); }

/* Sections */
.wrap { max-width: max(84rem, 70%); margin: 0 auto; padding: 0 clamp(1.25rem, 5vw, 4rem); }
.band { padding: clamp(4.5rem, 10vw, 7.5rem) 0; border-top: 1px solid var(--line); }
.band:nth-of-type(odd) { background: var(--s1); }
.index { margin: 0 0 0.875rem; font: 600 0.75rem/1 var(--mono); letter-spacing: .16em; text-transform: uppercase; color: var(--muted); }
.index span { color: var(--yellow); margin-right: 0.625rem; }
.band h2 { font-size: clamp(2.125rem, 4vw, 3.25rem); line-height: 1; max-width: 18ch; }
.sub { margin: 1.125rem 0 0; max-width: 62ch; color: var(--text-2); }
.fine { margin: 1.375rem 0 0; font-size: 0.8125rem; color: var(--muted); }
.oooi, .steps, .features { list-style: none; margin: 3rem 0 0; padding: 0; display: grid; gap: 1px; background: var(--line); border: 1px solid var(--line); }
.oooi { grid-template-columns: repeat(4, 1fr); }
.steps { grid-template-columns: repeat(4, 1fr); }
.features { grid-template-columns: repeat(3, 1fr); }
.oooi li, .steps li, .features li { background: var(--bg); padding: 1.625rem 1.5rem 1.75rem; }
.oooi b { font: 700 1.875rem/1 var(--display); color: var(--yellow); }
.oooi .t { display: block; margin-top: 0.375rem; font: 600 0.8125rem/1 var(--mono); color: var(--muted); }
.oooi h3, .steps h3, .features h3 { margin-top: 1.125rem; font-size: 1.375rem; }
.oooi p, .steps p, .features p { margin: 0.5rem 0 0; color: var(--text-2); font-size: 0.9375rem; }
.steps span, .features b { font: 600 0.75rem/1 var(--mono); letter-spacing: .14em; color: var(--yellow); }
.split { display: grid; grid-template-columns: 1fr 1fr; gap: 1px; background: var(--line); border: 1px solid var(--line); }
.split article { background: var(--bg); padding: clamp(1.75rem, 4vw, 3rem); }
.split .for { margin: 0; font: 600 0.75rem/1 var(--mono); letter-spacing: .16em; text-transform: uppercase; color: var(--yellow); }
.split h3 { margin-top: 1rem; font-size: clamp(1.75rem, 3vw, 2.375rem); }
.split p { color: var(--text-2); }
.start-grid { display: grid; grid-template-columns: 1.4fr 1fr; gap: 4rem; align-items: start; }
.facts { list-style: none; margin: 0; padding: 0; border-left: 2px solid var(--yellow); }
.facts li { padding: 0 0 1.375rem 1.375rem; color: var(--text-2); font-size: 0.9375rem; }
.facts b { display: block; color: var(--text); font: 600 1.125rem/1.2 var(--display); margin-bottom: 0.25rem; }
.foot { border-top: 1px solid var(--line); padding: 2.5rem 0; color: var(--text-2); font-size: 0.875rem; }
.foot-grid { display: grid; grid-template-columns: 1fr auto; gap: 0.5rem 2rem; align-items: center; }
.foot p { margin: 0; }
.foot nav { display: flex; gap: 1.375rem; }
.foot nav a { color: var(--text-2); }
.foot .fine { grid-column: 1 / -1; margin-top: 0.375rem; }

/* Smaller screens */
@media (max-width: 1100px) { .stats { display: none; } .card { display: none; } .features { grid-template-columns: repeat(2, 1fr); } }
@media (max-width: 900px) {
  .scrim { background: linear-gradient(180deg, rgba(9,12,15,.6) 0%, rgba(9,12,15,.78) 45%, rgba(9,12,15,.9) 75%, var(--bg) 100%); }
  .oooi, .steps { grid-template-columns: repeat(2, 1fr); } .start-grid, .split { grid-template-columns: 1fr; } .start-grid { gap: 2.5rem; }
}
@media (max-width: 640px) {
  .nav nav a:not(.signin) { display: none; }
  .oooi, .steps, .features { grid-template-columns: 1fr; }
  .readout { display: none; }
  .legend .long { display: none; }
  .eyebrow { font-size: 0.6875rem; letter-spacing: .12em; gap: 0.625rem; }
  .eyebrow::before { width: 1.375rem; }
  .copy { padding-top: 6.25rem; padding-bottom: 3.5rem; }
  .actions { margin-top: 1.5rem; }
  .foot-grid { grid-template-columns: 1fr; }
}
@media (prefers-reduced-motion: reduce) { .card { transition: none; } }

/* 404 */
.notfound-page { min-height: 100vh; background: var(--bg) radial-gradient(ellipse at 70% 40%, #171c21 0%, #0b0e11 60%, var(--bg) 100%); }
.notfound { max-width: 46rem; margin: 0 auto; padding: 12rem clamp(1.25rem, 5vw, 4rem) 6rem; }
.notfound h1 { margin-top: 1.25rem; font-size: clamp(2.5rem, 5vw, 4.5rem); line-height: .95; }